- Definitions|2
- Thesaurus|716
- Abbreviations|0
23 entries under labour topic. ×
| strong(adjective, sound, reasonable, strain, rational) | |
| firm(adjective, strain, true, firmness, constant) | |
| hard(adjective, strain, firmness, hardiness) | |
| sound(adjective, reasonable, strain, firm, true) | |
| stable(adjective, strain, firm, true, firmness) | |
| stiff(adjective, strain, firmness, hardiness) | |
| fast(adjective, strain, firm, firmness, constant) | |
| tenable(adjective, strain, firmness, safety) | |
| unyielding(adjective, strain, firmness, hardiness) | |
| proof(adjective, strain, firmness, hardiness) | |
| resistant(adjective, strain, firmness, hardiness) | |
| steadfast(adjective, strain, firmness, hardiness) | |
| rigid(adjective, strain, firmness, hardiness) | |
| robust(adjective, strain, firmness, hardiness) | |
| substantial(adjective, strain, firmness, hardiness) | |
| tight(adjective, strain, firm, true, firmness) | |
| constant(adjective, strain, firmness, hardiness) | |
| durable(adjective, strain, firmness, hardiness) | |
| immune(adjective, strain, firmness, safe) | |
| lasting(adjective, strain, firmness, hardiness) |
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| APA | Smart Define. (2015). impregnable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/impregnable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impregnable thesaurus" https://smartdefine.org/impregnable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, impregnable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/impregnable/thesaurus/synonyms>. |
| MLA | Smart Define. "impregnable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/impregnable/thesaurus/synonyms> |